Since its birth, Cartier has relied on functional and practical mechanical technology to create classic and unique works for high-end watch lovers. The new Rotonde de Cartier calendar watch perfectly fulfills this goal. As an efficient and practical timepiece, it fully reflects the balance between tradition and modernity that only the largest watchmakers can achieve.
The annual calendar is a new star in the watchmaking industry. It has been successfully commissioned for less than 15 years and has quickly become an indispensable date display function for daily watches. Although the almanac is easy to operate and can be adjusted without resetting, it has never appeared in the Cartier watch series before. To meet the expectations of watch enthusiasts, the Cartier movement research and development team incorporated this feature into Rotonde de Cartier watches, displaying complete and accurate year-round calendar information on the dial.
The simple calendar function, that is, the mechanism of displaying the date through a window or pointer, must be manually adjusted at the end of each 30-day month (ie, the month with an even date) to ensure that the watch is synchronized with the calendar. However, this simple corrective action is often forgotten, which may cause small errors every month and need to be corrected manually.
Manually winding the crown, skipping the 31st, and directly displaying the 1st, this irrelevant mechanical system quickly became annoying. Because of this, watchmakers invented the perpetual calendar mechanism in the 18th century. As long as the timepiece is operating normally, the dial can directly display accurate calendar information without further adjustment. Although this machine with digital memory is fascinating, it can still cause trouble if it is stopped for a long time. This highly precise model requires a lot of operation if the calendar display needs to be readjusted, so that the watch owner sometimes has to consult professionals.
In order to avoid the restrictions when starting the watch, the Cartier movement design team developed a reliable, efficient and tough mechanism for the Rotonde de Cartier calendar watch, which can automatically adjust the date at the end of each month (different between 30 and 31 days). Month), and the week and month are displayed throughout the year. Except for February 28 or February 29 to March 1, manual operation is required, no other adjustments are required.
Cartier’s new 9908 MC workshop refined movement has a unique setting mechanism that can adjust all the calendar information (day, date and month) through the winding crown. This simple setting system avoids adding any adjustment device to the case, which simplifies daily use to the maximum.
In this Rotonde de Cartier calendar watch, Cartier chose to use the 1904 MC movement as the basis, and directly load the calendar device on the main plate of the movement. Thanks to countless tests, the large calendar display window at 12 o’clock on the watch can display independent two-digit numbers, and the cascade control system operated by the winding crown can quickly set up various displays of the annual calendar, and these designs are available Favored by lovers of fine watchmaking. This exceptional movement, completely developed in-house by the Cartier brand, is very new and incorporates many important features, including a semi-instant mechanism that converts a large calendar into two independent numbers (about an hour conversion period), ensuring this advanced The watchmaking paradigm has the highest timing stability. In this system, the needle wheel on the large single-digit display panel drives the ten-digit four-pointed star wheel to rotate. The single digit display is the real core component of the calendar system, and at the same time has another secret-a simple and clever mechanism, the month memory cam is directly combined with the light rim of the calendar device, and once the current month is set, it can be accurate Ground display for 30 or 31 days.
The device has unparalleled efficiency and is designed to calculate the length of odd and even date months (except for February, which changes from 28 days to 29 days every four years), and will not affect the accuracy even under strong vibration.
Cartier designers successfully combined the date display with the day of the week and month display with a pointer puller. This automatic calendar is also rigorously tested to meet the needs of everyday life.